US8260405B2 - Monitoring apparatus for monitoring a user's heart rate and/or heart rate variation; wristwatch comprising such a monitoring apparatus - Google Patents

Monitoring apparatus for monitoring a user's heart rate and/or heart rate variation; wristwatch comprising such a monitoring apparatus Download PDF

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Publication number
US8260405B2
US8260405B2 US12/097,764 US9776406A US8260405B2 US 8260405 B2 US8260405 B2 US 8260405B2 US 9776406 A US9776406 A US 9776406A US 8260405 B2 US8260405 B2 US 8260405B2
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heart rate
body part
electrodes
acceleration
monitoring
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US20080262364A1 (en
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Ronaldus Maria Aarts
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Koninklijke Philips NV
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Koninklijke Philips Electronics NV
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Assigned to KONINKLIJKE PHILIPS ELECTRONICS N V reassignment KONINKLIJKE PHILIPS ELECTRONICS N V ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AARTS, RONALDUS MARIA
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/021—Measuring pressure in heart or blood vessels
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/02405—Determining heart rate variability
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G21/00—Input or output devices integrated in time-pieces
    • G04G21/02—Detectors of external physical values, e.g. temperature
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A61B5/02—Detecting, measuring or recording pulse, heart rate, blood pressure or blood flow; Combined pulse/heart-rate/blood pressure determination; Evaluating a cardiovascular condition not otherwise provided for, e.g. using combinations of techniques provided for in this group with electrocardiography or electroauscultation; Heart catheters for measuring blood pressure
    • A61B5/024—Detecting, measuring or recording pulse rate or heart rate
    • A61B5/02438—Detecting, measuring or recording pulse rate or heart rate with portable devices, e.g. worn by the patient
    • G—PHYSICS
    • G16—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR SPECIFIC APPLICATION FIELDS
    • G16H—HEALTHCARE INFORMATICS, i.e. INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR THE HANDLING OR PROCESSING OF MEDICAL OR HEALTHCARE DATA
    • G16H40/00—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices
    • G16H40/60—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices
    • G16H40/63—ICT specially adapted for the management or administration of healthcare resources or facilities; ICT specially adapted for the management or operation of medical equipment or devices for the operation of medical equipment or devices for local operation

Definitions

  • the invention relates to a monitoring apparatus for monitoring a user's heart rate and/or heart rate variation.
  • Apparatuses for monitoring a user's heart rate and/or heart rate variation generally have a medical use, such as for determining the occurrence of a heart failure and/or the possibility of occurrence a heart failure.
  • Such apparatuses are used by athletes, for example in a training scheme.
  • a monitoring apparatus is known from American patent specification U.S. Pat. No. 3,838,684.
  • the monitoring apparatus comprises a pressure sensitive sensor, which during use abuts a part of a skin surface for measuring the heart rate.
  • the pressure pulses obtained by the sensor are converted to an electrical pulse.
  • a light source is provided which allows a user to count the light pulses representative of each heart beat during a 15 second interval to thereby determine visually what his heart rate is at any given time.
  • the apparatus is compact and strapped about the wrist.
  • a disadvantage of the known monitoring apparatus is its unreliability, because in order to obtain good heart rate measurements, the pressure sensor is required to be located exactly on a position adjacent to a blood vessel from which the measurements are to be obtained. Therefore, the apparatus is not suitable for use by athletes who prefer to use the apparatus while running, jumping and/or moving in any other manner.
  • An object of the present invention is to address the disadvantages mentioned above.
  • a monitoring apparatus for monitoring a user's heart rate and/or heart rate variation, the apparatus comprising: a capacitor having at least two capacitor electrodes, wherein the capacitor electrodes are position able adjacent to different surface parts of a body part of a person, the body part being for example a person's limb, for example an arm, such that an electrical capacitance of the capacitor is influenced by blood pressure pulses of blood running through the body part, wherein the apparatus further comprises a data processor for determining the heart rate and/or heart rate variation from changes in the capacitance of the capacitor.
  • the different surfaces are located at substantially opposite sides of the person's body part, particularly such that the body part extends between the electrodes during use.
  • a preferred embodiment of the apparatus comprises an output device for auditively and/or visually making knowable to the user the heart rate and/or heart rate variation determined by the data processor.
  • the apparatus comprises an oscillator for sending an oscillating signal through the capacitor to be able adequately determines capacity changes.
  • the oscillator is arranged to generate a binary signal.
  • An advantage of a binary signal is that in the data processor no further A/D-converter is necessary.
  • the data processor of a further embodiment of the apparatus comprises a one shot unit for generating a pulse train, wherein the pulse train is formed by pulses generated by the one shot unit in response to an up going flank or a down going flank in the oscillating signal.
  • the data processor may comprise an averaging unit for generating a moving average of the pulse train, the moving average being indicative of a frequency changes of the oscillating signal.
  • an accelerometer is provided for determining acceleration of the body part. If the acceleration of body part is known while monitoring the heart rate and/or heart rate variation, it is possible to compensate for any interference and/or disturbance occurring as a result of the acceleration.
  • the data processor can be arranged for determining an estimation of a disturbance value in measurements which value has been caused by the acceleration of the limb.
  • the single wristband comprising the capacitor having the at least two capacitor electrodes preferably also comprises the data processor, and more particularly also comprises the output device
  • FIG. 1 is a perspective view of a first embodiment of the apparatus according to the present invention
  • FIG. 2 is a top view of the apparatus shown in FIG. 1 ;
  • FIG. 3 is a schematic of a data processor, as comprised in the apparatus of FIGS. 1 and 2 ;
  • FIG. 4 is a top view of a modification of the apparatus shown in FIGS. 1 and 2 ;
  • FIG. 5 is a top view of a second embodiment of the apparatus according to the present invention.
  • FIG. 1 shows a hand 1 and a wrist 2 of an arm 3 of a person who is using a first embodiment of a monitoring apparatus 4 .
  • the apparatus 4 comprises a housing 6 having a time display 8 with two pointers 10 and 12 , and a wrist band having a first strap part 14 and a second strap part 16 .
  • the apparatus is configured to provide an electrical capacitor 22 , having electrodes 18 , 20 .
  • Each of the strap parts 14 , 16 is provided with a capacitor electrode 18 , 20 in the form of a plate 18 , 20 , together forming the capacitor 22 during use, when the apparatus is carried by a user.
  • the capacitor plates can be positioned adjacent to different surface parts. In the embodiments shown, the surface parts are located on substantially opposite sides of the arm 3 when in use, that is, on sides of arm 3 that are substantially faced away from each other.
  • the electrodes 18 and 20 are electrically coupled to an oscillator 24 , which, in operation, sends a periodic, electrical signal through the capacitor 22 .
  • the apparatus 4 further comprises a data processor 26 for determining the heart rate and/or heart rate variation from changes in the capacitance of the capacitor.
  • the apparatus 4 comprises an output device 28 for auditively and/or visually making knowable to the user the heart rate and/or heart rate variation determined by the data processor 26 .
  • the output device 28 is formed by a visual display 30 .
  • the data processor 26 preferably comprises a frequency detector. Many kinds of frequency detectors are suitable for use in the data processor 26 . However, in this specific embodiment (see FIG. 3 ), frequency detector of the data processor 26 of the apparatus 4 comprises a converter 32 for converting the periodic signal to a binary signal. In this specific embodiment the converter is a comparator with an output which is a logical one if the input is >0 and which output is a logical zero if the input is ⁇ 0. However, other kinds of suitable converters may be employed.
  • the frequency detector further comprises a one shot unit 34 for generating a pulse train B as an exit signal in response to a change in signal value of the binary signal and an averaging unit 36 for generating a moving average ⁇ B> of the pulse train B generated by the one shot unit 34 .
  • an oscillator can be provided arranged to generate a binary signal, such as a block signal.
  • the moving average value generated by the averaging unit 36 is indicative of the frequency of the binary signal.
  • the calculating unit 38 can calculate the heart rate and/or heart rate variations.
  • An athlete using the apparatus 4 which, in this embodiment, is incorporated in a wrist watch, can, for instance while running, easily check his heart rate and/or variations therein by looking at his watch. If the heart rate becomes too high, the athlete can lower his effort in order to maintain a predetermined training scheme.
  • the apparatus 4 may be used while playing computer games.
  • the heart rate and/or heart rate variations may be used as a parameter in computer games.
  • the abilities of a computer game character to be controlled by the user of the apparatus may, for instance, be influenced by the heart rate of the user.
  • Another application is use of the apparatus, wherein the heart rate and/or heart rate variations are used to determine the occurrence of a heart failure and/or the possibility of occurrence of a heart failure.
  • the apparatus can be arranged to generate an alarm signal to an external receiver 40 .
  • FIG. 4 A modification of the first embodiment is shown in FIG. 4 in which an output device 28 is provided for auditively making knowable to the person the heart rate and/or heart rate variation.
  • the output device 28 is formed by a socket 42 and an earpiece 44 having a wiring 46 and a plug 48 , which is arranged to be inserted in the socket 42 .
  • the data processor 26 is arranged to periodically notify the person of his/her heart rate and/or heart rate variations by using sound, for instance a human voice.
  • the earpiece 44 and the output device 28 may also be arranged to communicate in a wireless manner.
  • FIG. 5 schematically shows a second, more advanced embodiment of the apparatus.
  • the second embodiment of the apparatus is similar to the first embodiment.
  • the second embodiment of the apparatus also comprises an accelerometer 50 for determining acceleration of the arm 3 .
  • the accelerometer 50 determines an acceleration value of the arm 3 .
  • the data processor 26 is suitably arranged for determining an estimation of a disturbance value in measurements in the at least one electrical parameter caused by the acceleration of the arm in order to be able to compensate for this disturbance.
  • the accelerometer 50 may be arranged to recognize periodic patterns in the acceleration of the arm in order to even further increase the ability to compensate for the disturbance.
  • a mentioned wristband can be configured in various ways, and can include for example one or more straps, and/or be arranged in a different way.
  • a mentioned capacitor, data processor, and/or output device can be coupled to a wristband in various ways,
  • the capacitor, data processor, and/or output device can be coupled to the wristband can be integrally connected to the wristband, can be detachably connectable thereto, be at least partly comprised in a housing of the wristband, and/or in a different manner.
  • the heart rate and/or heart rate variation may be stored in a memory comprised in, for instance, the data processor.

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  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Cardiology (AREA)
  • Physics & Mathematics (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Medical Informatics (AREA)
  • Biophysics (AREA)
  • Pathology (AREA)
  • Engineering & Computer Science (AREA)
  • Biomedical Technology (AREA)
  • Veterinary Medicine (AREA)
  • Physiology (AREA)
  • Molecular Biology (AREA)
  • Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • General Physics & Mathematics (AREA)
  • Vascular Medicine (AREA)
  • Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
US12/097,764 2005-12-19 2006-12-11 Monitoring apparatus for monitoring a user's heart rate and/or heart rate variation; wristwatch comprising such a monitoring apparatus Active 2029-03-10 US8260405B2 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
EP05112425.3 2005-12-19
EP05112425 2005-12-19
EP05112425 2005-12-19
PCT/IB2006/054734 WO2007072288A1 (en) 2005-12-19 2006-12-11 Monitoring apparatus for monitoring a user's heart rate and/or heart rate variation; wristwatch comprising such a monitoring apparatus

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US20080262364A1 US20080262364A1 (en) 2008-10-23
US8260405B2 true US8260405B2 (en) 2012-09-04

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US (1) US8260405B2 (de)
EP (1) EP1965695B1 (de)
JP (1) JP2009519739A (de)
CN (1) CN101330868B (de)
AT (1) ATE508681T1 (de)
RU (1) RU2428106C2 (de)
WO (1) WO2007072288A1 (de)

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ATE508681T1 (de) 2011-05-15
EP1965695A1 (de) 2008-09-10
JP2009519739A (ja) 2009-05-21
CN101330868A (zh) 2008-12-24
US20080262364A1 (en) 2008-10-23
EP1965695B1 (de) 2011-05-11
RU2428106C2 (ru) 2011-09-10
RU2008129703A (ru) 2010-01-27
WO2007072288A1 (en) 2007-06-28
CN101330868B (zh) 2011-01-26

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